×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# lime hopper spray water

 Forum Search FAQs Links MVPs

## lime hopper spray water

(OP)
Good day fellow engineers

set-up shown in image below has blockage challenges at the eductor area (actually at pipe attached after eductor). my suspicions are that ring spray water is not adequate enough to wash down the settled lime powder on the hopper, but i dont know the calculations to prove my hypothesis. as far as process parameters are concerned there is enough ring spray water delivered.
please assist me with design calculations used to determine the amount of water to be used for wash down.

### RE: lime hopper spray water

Instead of trying to calculate it why not just try different amounts of water?

Is the ring spray of water there to wash the lime in or is to start the dissolution process? Maybe no water might work as well provided the limme hopper was clean and shiny.

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

### RE: lime hopper spray water

My thought: Is adding water sufficient to solve the problem? If you, for instance at start up, have an excess of lime or too small amount of water, could this probably lead to lime clumping and layer sticking to walls, solidifying and not easy to dissolve?

Is your problem clogging i clumps or layer on walls, or both?

Suggestions:
Water added parallell to wall at opposite points to make suction swirl
Make 'clumptrap' with drainable well with separated inlet/outlet
Visual inspection or somehow mechanical/electronical warning
Recycling of water if water cost or amount is a problem

### RE: lime hopper spray water

Perhaps an agitator to hasten the lime dissolution process; once had a pH adjustment system [written about in another post] where the agitator was pitifully tiny for the amount of lime to be dissolved; posed major issues...

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

### RE: lime hopper spray water

You need an idea of how much lime is being washed out.
One thought is to make sure that the line isn't too large.
You want to keep velocities high, but not choke the eductor.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

### RE: lime hopper spray water

What you have described is a sluicing eductor.

Sluicing Eductor

The operating results will be difficult to predict because of the materials that you are handling. You may have material clumping, bridging, different volumes of sluicing water, effects due to shape of hopper, etc.

Performance chart is listed here:

Performance Chart

Here is a picture of an eductor that was used on a recent project. These eductors are used to sluice media in order to load water treatment vessels with media. This eductor includes a pump to add water pressure.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

#### Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!